WB Tegetmeier, Headline "Letters to the editor" Molecular motion, Prof. Maxwell, F Guthrie, Graaff Reinet College, Prof. Ludwig Boltzmann, J Clerk Maxwell. Headline "The Germans and physical axioms", Herbert Spencer, Chas G Root. Headline "The long Peruvian skull" Dr Daniel Wilson, Prof. J Wyman, J Bernard Davis, Jeffries Wyman. Headline "Lakes with two outfalls" Denver River, Rio Grande River, Edward S Holden, Capt JD Cochrane, Okota River, Koudousou River, SW Burnham. Headline "Palaeotherium magnum".